| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 2 | 2 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 3 | 3 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 4 | 7 | 
                                                                 
                                    
                                    8%
                                 
                                                             | 
                                                        
                    |
| 5 | 12 | 
                                                                 
                                    
                                    13.8%
                                 
                                                             | 
                                                        
                    |
| 6 | 9 | 
                                                                 
                                    
                                    10.3%
                                 
                                                             | 
                                                        
                    |
| 7 | 22 | 
                                                                 
                                    
                                    25.3%
                                 
                                                             | 
                                                        
                    |
| 8 | 17 | 
                                                                 
                                    
                                    19.5%
                                 
                                                             | 
                                                        
                    |
| 9 | 11 | 
                                                                 
                                    
                                    12.6%
                                 
                                                             | 
                                                        
                    |
| 10 | Very effective | 4 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    
| 11 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 288 |